提问

Read-Only in Excel
When I execute the code below it prints out in Excel ok but it is in "Read-Only". How do I stop "Read-Only"? exl = actxser...

11 years 前 | 1 个回答 | 0

提问

Crunch the numbers after a large operation
How do you get Matlab to crunch the numbers after a large operation? It leaves Addition, Subtraction, Multiplication, Division ...

11 years 前 | 1 个回答 | 0

提问

Real Roots of a Polynomial
I have used "solve" to factor a fourth order polynomial. It has four roots with three complex numbers. I used: xf = solve...

11 years 前 | 2 个回答 | 0

提问

3 equations and 3 unknowns
I have 3 equations and 3 unknowns. Is there a way to solve for them? 4*x + 5*y + 6*z = 7 3*x + 2*y + 4*z = 5 2*x +...

11 years 前 | 1 个回答 | 0

提问

syms first then add numbers
This may sound silly but I would like to write an equation in "syms" variables to actually see the variables in the equation the...

11 years 前 | 1 个回答 | 0

提问

Derivative of t when t is a number
If t is a number. How do you take the derivative of t and get a numerical result without using syms? x = 5*t^2 - 4*t + 6 ...

11 years 前 | 1 个回答 | 0

提问

Magnitude of a vector
syms x y z r = [x y z] rmag??? rmag should equal (x^2 + y^2 + z^2)^0.5

11 years 前 | 4 个回答 | 4

提问

Finding the Position Vector and Metric Tensor
syms ax ay a vx vy vz x0 y0 z0 a=[ax ay az] v=[vx vy vz] r=[x0 y0 z0] x=sym(zeros(4)) dx=sym(zeros(4)) g_ab=...

11 years 前 | 0 个回答 | 0

提问

"Which Sym" statement so the sym statement will work
which sym class(sym) Gup=sym(zeros(2,2)) I put "which sym" before the sym statement and I still get this error" ...

11 years 前 | 2 个回答 | 0

提问

Initilize a Symbolic Toolbox array
I am getting an error in line: Gup=sym(zeros(2,2)) I am trying to initilize a Symbolic Toolbox array. This equation has...

11 years 前 | 0 个回答 | 0

已回答
Substituting a syms variable with another syms variable equation
No the "sym" in "f=sym(zeros(4,4,4))" creates "f" as a symbolic zero matrix.

11 years 前 | 0

提问

Substituting a syms variable with another syms variable equation
Error code: ??? Subscript indices must either be real positive integers or logicals. Error in ==> EigenValuesVecto...

11 years 前 | 2 个回答 | 0

提问

Substituting a syms with an equation
I have a syms Array: syms A11 A12 A13 A21 A22 A23 A31 A32 A33 a b c x y z A=[A11 A12 A13;A21 A22 A23;A31 A32 A33] . ...

11 years 前 | 1 个回答 | 0

提问

More non-singleton rhs dimensions than non-singleton
??? Assignment has more non-singleton rhs dimensions than non-singleton subscripts. Error in ==> EigenValuesVectors4x4ToTens...

11 years 前 | 1 个回答 | 0

提问

System of equations for Tensors, Eigenvalues and Eigenvectors
I am trying to get a system of equations for Eigenvalues and Eigenvectors. T matrix equation is: (T(i,k)-L(r)*I)*A(r,k)=...

11 years 前 | 0 个回答 | 0